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From: Alexander Terekhov (terekhov_at_[hidden])
Date: 2004-10-21 04:31:49

Peter Dimov wrote:
> Rob Stewart wrote:
> > What if the class had the option, at least, to hold multiple
> > forms, creating each on demand? Then, the operations you invoke
> > would simply request the particular form they require. If that
> > form is not currently available, it is generated.

DCCI is what you need here.

> The classic problem is that logically const operations are now physically
> non-const (as I was surprised to learn from Howard Hinnant, this is the case
> with std::locale.)
> The implicit thread safety contract ("basic thread safety") says that unless
> stated otherwise, several logically const operations can be performed
> concurrently. This would now require a mutex lock.

Or lockless atomic<>. ;-)


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